321.

Mercury at inferior solar conjunction Mercury passes around the near side of the Sun. Sat, 07 Jan 2023 at 07:53 EDT (526 days ago) in Sagittarius

322.

The Moon at apogee The Moon recedes to its orbit's furthest point from the Earth, making it appear fractionally smaller than at other times of the month. Sun, 08 Jan 2023 at 04:19 EDT (525 days ago) in Cancer

323.

Comet C/2022 E3 (ZTF) passes perihelion Comet C/2022 E3 (ZTF) makes its closest approach to the Sun. Thu, 12 Jan 2023 (521 days ago)

324.

Mars ends retrograde motion Mars returns to its usual eastward motion after opposition. Thu, 12 Jan 2023 at 15:54 EDT (521 days ago) in Taurus

325.

Comet C/2022 U2 (ATLAS) passes perihelion Comet C/2022 U2 (ATLAS) makes its closest approach to the Sun. Sat, 14 Jan 2023 (519 days ago) in Cassiopeia

326.

Moon at Last Quarter The Moon reaches last quarter phase – rising in the east at around midnight and appearing high in the sky by sunrise. Sat, 14 Jan 2023 at 21:10 EDT (519 days ago) in Virgo

327.

The cluster Messier 47 is well placed The open star cluster M47 (NGC 2422; mag 4.4) in Puppis culminates at around midnight local time. Sun, 15 Jan 2023 (518 days ago) in Puppis

328.

NGC 2403 is well placed NGC 2403 (mag 8.9), a spiral galaxy in Camelopardalis culminates at around midnight local time. Sun, 15 Jan 2023 (518 days ago) in Camelopardalis

329.

Asteroid 2 Pallas at opposition Asteroid 2 Pallas makes closest approach to the Earth. Sun, 15 Jan 2023 at 23:46 EDT (517 days ago) in Canis Major

330.

Lunar occultation of Delta Scorpii The Moon will pass in front of Delta Scorpii (Dschubba), creating a lunar occultation visible from Asia, Christmas Island, Spratly Islands and Paracel Islands. Tue, 17 Jan 2023 at 17:29 EDT (516 days ago) in Scorpius

331.

The cluster NGC 2451 is well placed The open star cluster NGC 2451 (mag 2.8) in Puppis culminates at around midnight local time. Tue, 17 Jan 2023 (516 days ago) in Puppis

332.

134340 Pluto at solar conjunction 134340 Pluto is unobservable as it passes around the far side of the Sun – marking the end of one apparition and the beginning of the next. Wed, 18 Jan 2023 at 17:34 EDT (515 days ago) in Sagittarius

333.

γ-Ursae Minorid meteor shower 2023 The γ-Ursae Minorid meteor shower reaches its peak. Thu, 19 Jan 2023 (514 days ago) in Ursa Minor

334.

Conjunction of the Moon and Mercury The Moon and Mercury share the same right ascension, at a separation of 6°56'. Fri, 20 Jan 2023 at 02:51 EDT (513 days ago) in Sagittarius

335.

The cluster NGC 2516 is well placed The open star cluster NGC 2516 (mag 3.8) in Volans culminates at around midnight local time. Fri, 20 Jan 2023 (513 days ago) in Carina

336.

The Moon at perihelion The Moon passes its orbit's closest point to the Sun, which happens each month around the time of new moon. Sat, 21 Jan 2023 at 00:14 EDT (512 days ago) in Sagittarius

337.

New Moon The Moon disappears into the Sun's glare for a few days. Sat, 21 Jan 2023 at 15:54 EDT (512 days ago) in Capricornus

338.

The Moon at perigee The Moon makes its monthly closest approach to the Earth, making it appear fractionally larger than at other times of the month. Sat, 21 Jan 2023 at 15:57 EDT (512 days ago) in Capricornus

339.

Jupiter at perihelion Jupiter passes its orbit's closest point to the Sun. Sun, 22 Jan 2023 at 00:53 EDT (511 days ago) in Pisces

340.

Conjunction of Venus and Saturn Venus and Saturn share the same right ascension, at a separation of 21'. Sun, 22 Jan 2023 at 14:36 EDT (511 days ago) in Capricornus